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| 159 | * |
159 | * |
| 160 | * The default mode for interrupt servicing (Interrupt Mode) |
160 | * The default mode for interrupt servicing (Interrupt Mode) |
| 161 | * can not be used because of nested interrupts (which can occur |
161 | * can not be used because of nested interrupts (which can occur |
| 162 | * because interrupt are enabled in higher levels of interrupt handler). |
162 | * because interrupt are enabled in higher levels of interrupt handler). |
| 163 | */ |
163 | */ |
| 164 | inline static void switchToIrqServicingMode() |
164 | inline static void switch_to_irq_servicing_mode() |
| 165 | { |
165 | { |
| 166 | /* switch to Undefined mode */ |
166 | /* switch to Undefined mode */ |
| 167 | asm volatile( |
167 | asm volatile( |
| 168 | /* save regs used during switching */ |
168 | /* save regs used during switching */ |
| 169 | "stmfd sp!, {r0-r3} \n" |
169 | "stmfd sp!, {r0-r3} \n" |
| Line 281... | Line 281... | ||
| 281 | static void irq_exception_entry() |
281 | static void irq_exception_entry() |
| 282 | { |
282 | { |
| 283 | asm("sub lr, lr, #4"); |
283 | asm("sub lr, lr, #4"); |
| 284 | setup_stack_and_save_regs(); |
284 | setup_stack_and_save_regs(); |
| 285 | 285 | ||
| 286 | switchToIrqServicingMode(); |
286 | switch_to_irq_servicing_mode(); |
| 287 | 287 | ||
| 288 | CALL_EXC_DISPATCH(EXC_IRQ) |
288 | CALL_EXC_DISPATCH(EXC_IRQ) |
| 289 | 289 | ||
| 290 | load_regs(); |
290 | load_regs(); |
| 291 | } |
291 | } |